Changes in climate classification and extreme climate indices from a high-resolution future projection in Korea SCIE SCOPUS KCI

Cited 26 time in WEB OF SCIENCE Cited 26 time in Scopus
Title
Changes in climate classification and extreme climate indices from a high-resolution future projection in Korea
Author(s)
Yun, Kyung-Sook; Heo, Ki-Young; Chu, Jung-Eun; Ha, Kyung-Ja; Lee, Eun-Jeong; Choi, Yumi; Kitoh, Akio
KIOST Author(s)
Heo, Ki Young(허기영)
Alternative Author(s)
허기영
Publication Year
2012-08
Abstract
We investigate the future changes in the climate zone and six extreme temperature indices in Korea, using the 20-km high-resolution atmospheric general circulation model (MRI-AGCM3.1S). The Trewartha and Koppen climate classification schemes are applied, and four summer-based extreme temperature indices (i.e., summer days, tropical nights, growing degree days, and cooling degree days (CDD) and two winter-based indices (frost days and heating degree days (HDD) are analyzed. To represent significantly the change in threshold indices, the monthly mean bias is corrected in model. The model result reasonably captures the temporal and spatial distribution of the present-day extreme temperatures associated with topography. It was found that in the future climate, the area of the subtropical climate zone in Korea expands northward and increases by 21% under the Trewartha classification scheme and by 35% under the Koppen classification scheme. The spatial change in extreme climate indices is significantly modulated by geographical characteristics in relation to land-ocean thermal inertia and topographical effects. The change is manifested more in coastal regions than in inland regions, except for that in summer days and HDD. Regions with higher indices in the present climate tend to reveal a larger increase in the future climate. The summer-based indices display an increasing trend, while the winter-based indices show a decreasing trend. The most significant increase is in tropical nights (+452%), whereas the most significant decrease is in HDD (-25%). As an important indicator of energy-saving applications, the changes in HDD and CDD are compared in terms of the frequency and intensity. The future changes in CDD reveal a higher frequency but a lower temperature than those in HDD. The more frequent changes in CDD may be due to a higher and less dispersed occurrence probability of extreme temperatures during the warm season. The greater increase in extreme temperature events during the summer season remains an important implication of projecting future changes in extreme climate events.
ISSN
1976-7633
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/3486
DOI
10.1007/s13143-012-0022-6
Bibliographic Citation
ASIA-PACIFIC JOURNAL OF ATMOSPHERIC SCIENCES, v.48, no.3, pp.213 - 226, 2012
Publisher
KOREAN METEOROLOGICAL SOC
Subject
20-KM MESH AGCM; PRECIPITATION EXTREMES; TEMPERATURE; TRENDS; MODEL; EVENTS; CHINA
Keywords
climate classification; Extreme climate; future climate change; East Asian climate; high resolution model
Type
Article
Language
English
Document Type
Article
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